Electromagnetic throttle governor



.lune 24 1924, 1,498,937 T. swAR-rz ELECTROMAGNETIC THROTTLE GOVERNOR Filed Nov. 17, 1919 NVENTOR. l' TSU/artt;

BY V WA4] ATTORNEYL.

Patented June 24, 1924.

unirsi) .STATES 1,4%8537 PATENT OFFICE.

IRA T. SWARTZ, OF INDIANAPOLIS, INDIANA, ASSIGIIOR TO SJVRTZ ELECTRIC COM- PANY, OF INDIANAPLIS, INDIANA, A CORPORATION OF INDIANA.

ELECTROMAGNETIC THR-OTTLE GOVERNOR.

Application led November 1.7, 1919.

To all Aiff/"20m 1' may concern.'

Be it known that l, IRA T. SwARTz, a citizen of the lUnited States, residing at Indianapolis, in the county of Marion and State oli Indiana, have invented certain new and useful Improvements in Electromagnetic Throttle Governors7 ot which the following is a specification.

This invention relates to throttle governors adapted for use with internal combustion engines, more especially toV an electromagnetically operated throttle governor of a type wherein a movable plunger is operatively connected to the throttle valve and is actuated by fluctuations in the voltage generated in a dynamo electric machine cooperating with the internal combustion engine.A

My present invention constitutes an imi'irovement over the device described and claimed in my co-pending` application. Serial No. 315,190, filed August et, 19.19, on throttle governors, it being among the objects of this invent-ion to produce a governor which is more sensitive and reliable, which will not allow the engine to run away7 and which gives steadier operation of the electric power system in which it is inserted.

Hitherto considerable dithculty has been encountered in eliminating the blink or flickering of the lamps on a circuit which is being supplied by a dynamo operated b v an internal comluttion engine. Such blink is largely due to the liuctuations in the engines speed, especially at the lower speeds, and the governor disclosed in the above mentioned application in a large measure overcomes such fluctuations, and also tluctua-tions or accidental stopping of the engine due to a sudden demand on the generator which momentarily robs the voltage governor ot energy allowing the governing mechanism to shut the throttle and kill the engine.

My present invention more perfectly eliminates the fluctuations due to the above mentioned causes and equalizes the engines speed by a compara-tively simple device. In carrying the objects of my invention into ellect. I provide a specially constructed plunger having means thereon for better controlling the throttle opening. Specifically. my invention comprises a plunger the movements of which are controlled by asolenoid having a hollow central portion; a plunger rod lits into this opening and has a spring on the lower end contacting with the under side Serial No. 338,751.

le plunger and with a washer held by ut threaded on the lower end of the plunger rod. The upper end ot the plunger rod at a point a short distance above the top of the plunger is articulated to allow it to move eccentrically in performingl its governing function. i

Referring to the accompanying drawings forming a part hereof and in which similar reference characters denote similar parts.

The single figure illustrates a vertical section through my improved governor, some parts being shown in elevation.

The casing 1 of the governor carries a shaft 2, one end of which is connected to the throttle valve of the engine and t-he other end connects to the governor mechanism by adjustable means 3, and a cover plate it is provided to allow ot ready access for ad- Iiustment purposes. A solenoid 5 is iXed in the lower portion 6 of the casing and is connected to the dynamo operated by the engine in a well known manner. The inner portion ot the solenoid is closely fitted with a cylindrical casing 7 within which the plunger S. whose movements are controlled by the solenoid 5 is adapted to move.

A central opening 9 is formed in the plunger, in which opening a plunger rod 10 is lfoselv fitted to allow ot relative motion ot. plunger and plunger rod. The lower end 11 ot the rod is threaded to receive a nut 12 upon which a washer 13 rests, the washer serving as the lower support for a spring 14 inserted between the washer and the lower end 15 ot the plunger. The upper end of the plunger rod is jointed at 16, preferably at a point just above the upper end of the plunger, in order to allow the portion 17 of the plunger rod to move eccentrically on its pivot 1S in controlling the movements of the throttle valve.

The governor is initially set` by hand` as described in my co-pending application above referred to, the engine started. and the dynamo allowed to pick up voltage. The solenoid 5 is energized, acting upon the plunger 9 in'such a way as to hold the throttle valve in its proper open position. Should there be a sudden drain or demand upon the system. or a small amount of dirt momentarily block the opening of the carburetor needle valve, there is a. tendency for the plunger to drop and cut ott the throttle.

By the present. arrangement should a Condental downward motion to the throttle valve. It will be seen therefore that accidental and momentary fluctuations do not affect'my improved throttle governor, giving a steadier operation of the electric power system.

z Havingthus fully described my said invention, what I cla-im as new and desire 'to secure by Letters Patent, is-

l. A throttle governor comprising a casing, a horizontal throttle shaft in the casing,

a rockarm on the shaft, a hollow Cylinder supported by the casing below said crankpin and closed at its lower end, a stationary electroinagnet about .sa-id cylinder, an armature rfitting -looselyin the cylinder, a -rod extending loosely through the armature, a cushioning spring between the armature and Y operated yby the lower end of the rod, a connecting rod vbetween the cranlrpin and the first-named rod, the joint between said'rods being en- 'larged adjacent the upper end of the arma ture whereby the throttle shaft may be positively moved to-and-fro by the movements of the armature, substantially as set forth.

'2. `In a throttle governor for engines, means for preventing momentary fluctuations comprising a rocltshaft connected to the throttle valve, a rocha-rmv fixed to the shaft, a solenoid in circuit with a dynamo the engine, an armature connected to said arm arranged to be moved in one direction by the solenoid and in the other by gravity, and a spring in the connections between the armature andthe rockarm to prevent sudden closing of the throttle on temporary failure of the solenoid, substantially as set forth.

In witness whereof, I have `hereunto set my hand and seal at Indianapolis, Indiana, this 14th day of November, Al D. nineteen hundred and nineteen.

IRA T.

Titnesses H. V. BIERMAN, y M. L. SHULER.

SVVARTZ. n s] 

